When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?

Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?

The number of operators available for flights from Lambert-St Louis Airport to Sofia Airport is 2 as of July 2025.

How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.

What documentation or ID do you need to fly to Sofia Airport?

The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$593 Cheap Flights from St. Louis to Sofia in 2025

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Find the cheapest flights from St. Louis to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

3:20 pm - 11:00 pmSTL-SOF

23h 40m2 stops

6:15 am - 7:47 pmSOF-STL

21h 32m2 stops

$593United Airlines

Find Deal

Wed, Sep 3 - Wed, Oct 1

1:30 pm - 5:50 pmSTL-SOF

20h 20m2 stops

6:55 pm - 7:57 pmSOF-STL

33h 02m2 stops

$630

Find Deal

Tue, Aug 26 - Tue, Sep 2

1:30 pm - 1:20 pmSTL-SOF

15h 50m2 stops

6:35 pm - 1:30 pmSOF-STL

26h 55m1 stop

$660

Find Deal

Tue, Aug 26 - Tue, Sep 2

9:15 am - 5:50 pmSTL-SOF

24h 35m2 stops

6:15 am - 1:30 pmSOF-STL

15h 15m1 stop

$697

Find Deal

Wed, Sep 24 - Wed, Oct 22

5:30 pm - 10:50 pmSTL-SOF

21h 20m2 stops

6:15 am - 3:44 pmSOF-STL

17h 29m2 stops

$699Lufthansa

Find Deal

Fri, Sep 5 - Wed, Oct 1

9:15 am - 5:50 pmSTL-SOF

24h 35m2 stops

6:00 am - 1:30 pmSOF-STL

15h 30m2 stops

$713

Find Deal

Wed, Sep 24 - Wed, Oct 22

1:30 pm - 10:50 pmSTL-SOF

25h 20m2 stops

6:20 am - 1:30 pmSOF-STL

15h 10m1 stop

$745United Airlines

Find Deal

Fri, Aug 22 - Sun, Sep 14

3:59 pm - 8:20 pmSTL-SOF

44h 21m2 stops

9:10 pm - 8:26 pmSOF-STL

31h 16m2 stops

$754British Airways

Find Deal

Fri, Sep 5 - Sun, Oct 5

1:30 pm - 10:50 pmSTL-SOF

25h 20m2 stops

6:20 am - 10:08 pmSOF-STL

23h 48m2 stops

$755United Airlines

Find Deal

Fri, Aug 22 - Sun, Sep 14

5:30 pm - 10:50 pmSTL-SOF

21h 20m2 stops

6:15 am - 1:30 pmSOF-STL

15h 15m1 stop

$909Lufthansa

Find Deal

Fri, Sep 5 - Wed, Oct 1

United Airlines flights from St. Louis to Sofia

Our best United Airlines deals on St. Louis to Sofia flight tickets

United Airlines

Sep 3

STL3:20 pmLambert-St Louis

23h 40m

2 stops

SOF11:00 pmSofia

Oct 1

SOF6:15 amSofia

21h 32m

2 stops

STL7:47 pmLambert-St Louis

$593

Find similar

United Airlines

Aug 22

STL1:30 pmLambert-St Louis

25h 20m

2 stops

SOF10:50 pmSofia

Sep 14

SOF6:20 amSofia

15h 10m

1 stop

STL1:30 pmLambert-St Louis

$745

Find similar

United Airlines

Aug 22

STL1:30 pmLambert-St Louis

25h 20m

2 stops

SOF10:50 pmSofia

Sep 14

SOF6:20 amSofia

23h 48m

2 stops

STL10:08 pmLambert-St Louis

$755

Find similar

Lufthansa flights from St. Louis to Sofia

Our best Lufthansa deals on St. Louis to Sofia flight tickets

Lufthansa

Sep 5

STL5:30 pmLambert-St Louis

21h 20m

2 stops

SOF10:50 pmSofia

Oct 1

SOF6:15 amSofia

17h 29m

2 stops

STL3:44 pmLambert-St Louis

$699

Find similar

Lufthansa

Sep 5

STL5:30 pmLambert-St Louis

21h 20m

2 stops

SOF10:50 pmSofia

Oct 1

SOF6:15 amSofia

15h 15m

1 stop

STL1:30 pmLambert-St Louis

$909

Find similar

Lufthansa

Sep 24

STL3:30 pmLambert-St Louis

18h 20m

1 stop

SOF5:50 pmSofia

Oct 22

SOF6:15 amSofia

15h 15m

1 stop

STL1:30 pmLambert-St Louis

$930

Find similar

How to get the cheapest flight ticket from St. Louis to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from St. Louis is in February. Flight prices, which tend to average around $640, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Sofia from St. Louis during January instead. Flights to Sofia in January, while not as cheap as those in February, still average around $751.

What is the cheapest day to depart on your flight to Sofia?

According to our data, Saturday is the cheapest day to fly to Sofia from St. Louis. The lowest ticket price found for a Saturday departure recently was $1,095. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from St. Louis to Sofia on a Friday will generally be more expensive and average around $1,306. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

In the morning is the cheapest time of day to fly from St. Louis to Sofia when you can find flight prices for as low as $1,199. Flying to Sofia in the morning is an ideal time because this is during off-peak travel hours. In the afternoon is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,335 per ticket.

How far in advance should I book a flight to Sofia?

You are more likely to see cheaper flights to Sofia from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $1,021 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from St. Louis for as low as $815 on momondo.

When to book flights from St. Louis to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Sofia according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sofia

Best Price Found	$593
Fastest flight time	13h 45m
Direct flights	None
Airports in Sofia	1 airport

The best flight deal from St. Louis to Sofia found on momondo in the last 72 hours is $593

The fastest flight from St. Louis to Sofia takes 13h 45m

There are no direct flights from St. Louis to Sofia. Popular non-direct route for this connection is Lambert-St Louis Airport - Sofia Airport.

There is 1 airport near Sofia: Sofia (SOF)

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How far is Lambert-St Louis to Sofia by plane?
A flight from Lambert-St Louis to Sofia will travel around 5441.0 mi. 13h 45m is a normal flight duration for this route.
When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?
Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?
The number of operators available for flights from Lambert-St Louis Airport to Sofia Airport is 2 as of July 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Sofia?
Based on momondo bookings for flights between St. Louis and Sofia, the leading airline is Lufthansa, making up 79% of the total bookings. Other popular airlines include United Airlines with 21%.

Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $711	Free Cancellation	Rating 7.4 8,856 reviews		Search United Airlines flights
Lufthansa	PriceFrom $734	Free Cancellation	Rating 6.8 7,205 reviews		Search Lufthansa flights

Bansko

Velingrad

Borovets

Sandanski

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Can I find flights from St. Louis to Sofia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sofia from St. Louis with this policy.

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Once all potential St. Louis to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Sofia right now. Can momondo alert me if prices change?

Price alerts on flights to Sofia from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.